1. Department of Comparative Medicine, Lovelace Biomedical Research Institute, Albuquerque, New Mexico, USA
2. J. Craig Venter Institute, La Jolla, California, USA
3. Department of Pathology, University of California San Diego, San Diego, California, USA
4. Division of Vaccine Discovery, La Jolla Institute for Immunology, La Jolla, California, USA
5. W. Harry Feinstone Department of Molecular Microbiology and Immunology, The Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
6. Institute for Antiviral Research, Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, Utah, USA